How about a Super Lion with 30 SHP/ton machinery?

I thought it would interesting to try Admiral Fisher's concept ship, the Super Lion, with 30 SHP/ton machinery. To keep the size down (it is still large), I settled for an 8in belt. The armament is the usual 10-15/42 with 14-6in QF guns and 2-4in AA guns. The speed is the specified 30 knots. With light weight machinery, the ship is fairly interesting. I had started with the lightest weight machinery possible (about 42 SHP/ton) and then derated it to reach the 30 SHP/ton. This is the Springsharp report:

Super Lion, Great Britain Battlecruiser laid down 1912 (Engine 1923)

Displacement:
 34,201 t light; 36,003 t standard; 38,100 t normal; 39,777 t full load

Dimensions: Length overall / water x beam x draught
 745.00 ft / 745.00 ft x 101.00 ft x 30.00 ft (normal load)
 227.08 m / 227.08 m x 30.78 m  x 9.14 m

Armament:
      8 - 15.00" / 381 mm guns (4x2 guns), 1,920.00lbs / 870.90kg shells, 1912 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 15.00" / 381 mm guns (1x2 guns), 1,687.50lbs / 765.44kg shells, 1912 Model
   Breech loading guns in a turret (on a barbette)
   on centreline amidships
      14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
   Quick firing guns in casemate mounts 
   on side, all amidships, 6 raised mounts - superfiring
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1912 Model
   Anti-aircraft guns in deck mounts with hoists
   on side, all amidships, all raised mounts - superfiring
 Weight of broadside 20,311 lbs / 9,213 kg
 Shells per gun, main battery: 90
 4 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 520.00 ft / 158.50 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 225.00 ft / 68.58 m 12.00 ft / 3.66 m
   Main Belt covers 107 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 520.00 ft / 158.50 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 6.00" / 152 mm  10.0" / 254 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 10.00" / 254 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 147,605 shp / 110,113 Kw = 30.00 kts
 Range 6,500nm at 15.00 kts
 Bunker at max displacement = 3,774 tons

Complement:
 1,363 - 1,772

Cost:
 £3.825 million / $15.300 million

Distribution of weights at normal displacement:
 Armament: 2,306 tons, 6.1 %
 Armour: 10,290 tons, 27.0 %
    - Belts: 3,226 tons, 8.5 %
    - Torpedo bulkhead: 1,039 tons, 2.7 %
    - Armament: 2,754 tons, 7.2 %
    - Armour Deck: 3,028 tons, 7.9 %
    - Conning Tower: 244 tons, 0.6 %
 Machinery: 4,933 tons, 12.9 %
 Hull, fittings & equipment: 16,671 tons, 43.8 %
 Fuel, ammunition & stores: 3,899 tons, 10.2 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   45,287 lbs / 20,542 Kg = 26.8 x 15.0 " / 381 mm shells or 6.1 torpedoes
 Stability (Unstable if below 1.00): 1.11
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 17.0 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.88
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.591
 Length to Beam Ratio: 7.38 : 1
 'Natural speed' for length: 27.29 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  31.00 ft / 9.45 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (67 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 23.76 ft / 7.24 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 109.2 %
  - Above water (accommodation/working, high = better): 174.7 %
 Waterplane Area: 54,558 Square feet or 5,069 Square metres
 Displacement factor (Displacement / loading): 99 %
 Structure weight / hull surface area: 217 lbs/sq ft or 1,058 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.40
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent